Compilare: main.cpp: In function 'int main()': main.cpp:107:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 107 | for (int i = 0; i < ans.size(); ++i) | ~~^~~~~~~~~~~~ main.cpp:113:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for (int i = poz + 1; i < ans.size(); ++i) | ~~^~~~~~~~~~~~